a = {p = print}
a.p("hello world")
print = math.sin
a.p(print(1))
math.sin = a.p
math.sin(10,20)
foo = function(x) return 2 * x end
network = {
    {
        name = "grauna",IP = "210.26.30.34"
    },{
        name = "arraial",IP = "210.26.30.23"
    },{
        name = "lua",IP = "210.26.23.12"
    },{
        name  = "derain",IP = "210.26.23.20"
    }
}
table.sort(network,function(a,b)
    return (a.name > b.name)
end)